Product studio × Dev studio

We ship our own products
and engineer yours.

TwinCode is a product & engineering studio. We build and run Balansee, our own fintech app, and we design and ship custom mobile, web and backend systems for clients. Frontend, backend, databases: the whole stack, one team.

1
live fintech product
FE·BE·DB
full-stack in-house
End‑to‑end
idea → production
twincode.ts
const twincode = {
  product:  'Balansee', // our own fintech
  custom:   ['mobile', 'web', 'backend'],
  stack:    { fe: '✓', be: '✓', db: '✓' },
  ship:     async () => await deploy(),
}
building…

Two studios, one team

The twin model.

Most agencies only build for others. We do both, and each side makes the other sharper. Running our own product keeps us honest; client work keeps us versatile.

Product Studio

We build our own.

We design, build and operate Balansee — a personal-finance app people trust with their money. Real users, real uptime, real consequences. That product discipline goes into everything we ship.

  • Owned roadmap & design system
  • Production reliability & security
  • Data, payments & compliance
Explore Balansee
Custom Studio

We build yours.

Mobile and web apps, APIs, databases, infrastructure — whatever your product needs. One team owns frontend, backend and data, so nothing falls between the cracks.

  • Mobile & web applications
  • Backend, APIs & databases
  • Cloud, DevOps & AI integrations
See capabilities
Our product · Balansee

Money, made clear.

Balansee helps people see their income, spending and savings at a glance, and stick to a monthly plan. It's proof we don't just write code. We own products end to end, from the first pixel to production.

  • Income, expenses & savings tracking
  • Monthly plans & budget categories
  • Goals, debts & long-term planning
Build a product like this
Income2 800 €
Expenses2 117 €
Savings665 €
Monthly planMay 2026
Groceries300 / 400 €
Dining325 / 450 €
Transport120 / 150 €
Energy430 / 300 €

Custom studio

Everything your product needs.

One team across the whole stack. We take an idea and turn it into a running, maintainable system, and we stay to grow it.

Frontend

Fast, accessible interfaces with motion and craft. Web apps that feel native.

React · Angular · TypeScript

Backend

APIs and services built to scale: secure, observable and well-documented.

Node · NestJS · Python · Go

Databases

Data models that hold up. Relational, document or cache, picked for the job.

PostgreSQL · MongoDB · Redis

Mobile

Native-grade iOS & Android apps from a single, maintainable codebase.

React Native · Flutter

Cloud & DevOps

CI/CD, containers and infrastructure as code. Ship often, sleep well.

Docker · Kubernetes · AWS

AI integrations

LLM features, assistants and automation woven into real products.

OpenAI · Claude · RAG

How we work

Idea to production, in the open.

  1. Discover

    Learn the terrain

    We learn the business, users and constraints, then scope a measurable first release.

  2. Design

    Architect it right

    Prototype the experience and design an architecture that scales before we code.

  3. Build

    Ship in the open

    Short iterations, continuous delivery, demos you can click. No black boxes.

  4. Operate

    Run & grow it

    We operate, monitor and grow the product with you, like it's our own.

Let's build×together

Have a product in mind?
Let's make it real.

Tell us what you're building: a new app, a rebuild, or a team to ship it. We'll come back with a concrete plan for scope, stack and timeline.

We use your data solely to answer your enquiry. We never share it with anyone.